{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "08857b5ec5d91d83e69e40a36554a8c7557b7301"
            },
            {
              "fixed": "c44a04722f7dae9a45a101b8e100931ab59f1c18"
            },
            {
              "fixed": "72bd1bea37ea2c8553938f086bf48ccd2147dfe1"
            },
            {
              "fixed": "7d8104988f423572df1f3347ce578037b1043f34"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.16.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98603.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\novpn: replace bind when clearing stale local source\n\nThe UDP output fallback clears bind-\u003elocal in place when the remembered\nsource address is no longer usable. The bind is RCU-published and read\nlocklessly by concurrent TX, so an IPv6 reader can observe a torn\naddress.\n\nRetry the route lookup with source address autoselection without\nmodifying the bind. After a successful lookup, revalidate the bind and\nroute key under peer-\u003elock, reset the dst cache, and best-effort publish\na replacement bind with a wildcard local address.\n\nDo not cache the resolved dst when clearing the local source. Replacing\nthe source invalidates all per-CPU cache entries, while\ndst_cache_set_ip4 and dst_cache_set_ip6 update only the current CPU\nslot. The current packet can still use the resolved route; if bind\nallocation fails, a later cache miss retries the repair.",
  "id": "CVE-2026-98603",
  "modified": "2026-10-20T02:30:52.154349835Z",
  "published": "2026-10-18T15:19:16.215Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72bd1bea37ea2c8553938f086bf48ccd2147dfe1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d8104988f423572df1f3347ce578037b1043f34"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c44a04722f7dae9a45a101b8e100931ab59f1c18"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98603.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98603"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "ovpn: replace bind when clearing stale local source"
}